61 keys piano keyboard instrument Meterail:silicone,waterproof / foldable 100Tones 100 Rhythms ... prefer to choose the keyboard over the piano, not only because the piano is rather expensive, and large, ... Trumpet, Trombone, etc – all brass instruments, different types of piano’s, organs, violin, cello, etc – all stringed instruments, ... keyboard 61 keys silicone flexible roll up Piano Keyboard Instrument